SpionagethrillerAnthony Horowitz × Alex Rider 3: Skeleton Key Anthony HorowitzRavensburger Verlag GmbH 2011 Alex Rider 4: Eagle Strike Anthony HorowitzRavensburger Verlag GmbH 2011 Alex Rider 5: Scorpia Anthony HorowitzRavensburger Verlag GmbH 2011 Alex Rider 2: Gemini-Project Anthony HorowitzRavensburger Verlag GmbH 2010 Alex Rider 6: Ark Angel Anthony HorowitzRavensburger Verlag GmbH 2009 Alex Rider 7: Snakehead Anthony HorowitzRavensburger Verlag GmbH 2009